The term 'PARTNER OF EACH' is a phrase that refers to the idea of two people being in a relationship together. It implies that EACH person has an equal role in the relationship and that they are both committed to making it work. The crossword solutions for this term are 'MATE' (4 letters) and 'SPOUSE' (6 letters). Both words refer to a person who is in a romantic relationship with another person, usually of the opposite sex. The term 'MATE' is often used to refer to a more casual relationship, while 'SPOUSE' is used to refer to a more formal, long-term relationship.